Back-pressure valve for drainage systems



March 4, 1930. E. w. N. BOOSEY BACK PRESSURE VALVE FOR DRAINAGE SYSTEMS Filed Nov. 26. 1926 f0 7 Q J fl 1 7 v m \\\\\\1\\\\\I\\\ q H y a! W 4 4 m 4 0 6 4 5 g 2 r 3 I \l. I n3 $2.1.. Z rifiwf: 7 S H l l l I l I I I I v W W H 6 2 a H M m/W m m v J3 1 H 2 I N VEN TOR. amen M/V. zoojzy BY r ATTORNEY v Patented Mar. 4,] 1930 i I I g mates S ew? B ts amn M HI invention relates toa. fitting for age conduitsyan'd the-object of the invention is: to provide a simple and 1colnparatively I inexpensive: 'devicef for introduction in a a sewage *l-ine having meansiadapted on back fiowinto the'sewage line-.toclos'e the portion of 'theline connected-with theinlet orldr'ain. It is further provided with a manually operable' valve by whi'ch the: outlet line may be "'10 po'sitively; closed in theeventrthe back flow i n tz'iprevented y the "first 'nained means with which the: a r

paratus is provided.

iiriventionseeksitoienibody in a single unit an automatically ioperating valve for 15 closing the 'inlet'lcondui't through back flow in the I sewage line and in conjunction with whichiisprovided a 'positi verneans' for closing theisewage lineto the device: "Heretoforeywith devicesf of this nature an ordinary-swing va'lveis" used in a chamber,

outlet-ofwhich i's-conneeted witha'fsewer and to the inlet ofwhich a swingvalve is 7 applied; the inlet beingconnectedwith" a drainnom a building .-Suchdevices'hereto-j forein'usel-nsewage lines UtlllZlHgfL swing" valve for closing the inlet become inoperative alttimes due tothe" inl etfbecoming partially-clogged gwi'th Inate rialin a manner to prevent closingof the swin'g valve. Under 3 this oo'ndi'tion backpressure-i-n the outlet line opening to the chambercfauses fiowipast the v swing valve and into the drain and 'conseqflently'in'to the'YbuildingA 1 A feature of his'invention vision of avalve ofpeculianform*for 'clos ing the "outlet to the chamber and a connec tion provided therefor which is provided with an inclinedrunway onwhichthe valve rides. This inclined way through movement of the valve to desired position forcesthe face, thereof into wedging"engagement with the}? 'outlet' and closes the chamber to "back flow. This efiectually'eclosestheyoutlet line andpermitsfopeningof the chamber for re; .5 pair of the 'device', or= clearing of the device j .111?"snegiinnssonnfvntvn ree imn riiraen sj'ys'wn ms l ip'plication filed 1\|'ovembeif"26,-1926. Serial No."150,7s5.

topermit normal operationof a swing valve under absence of back flow from the outlet. Aufurther feature of the invention is in providing'a casing'havin'g an inlet adapted forconnection with a :drain and provided withfla. swing valveatadistanceabOve the bottom. of the chamber andpositioned above the outlet giving opportunityfor material'o't' a character that might naturally prevent closingof the swingfvalve topassito position below the said valvethus permits it to close. These several'objects and the various novel features of the invention are hereinafter more fullydescribed andclairned, andthe construction of a fitting involving my invention is shown in its preferred form in the accompanying drawings'in which Fig. *1 is a vertical section of my improved sewagefitting; I I 2'is a cross section thereof taken on meniber l' is provided -with a cylindrical flangefito receive a'tile drain 6 and a pacls ing 7 51s interposed between the tile and the flange 5, :The end ofthe tile may seat against the-bottom 8 of the recess formed about the threaded aperture for the ferrule 3 within the flange 5. The swing valve 4'is pivoted toia h1g9 on the ferrule 3 and the ferrule with the valve assembled thereon may he introduced into the interior of the casing through the upper end and threaded in place asshown. "It will be noted that the inlet member 3 is positioned some little distance above the bottom 10 of the casingl. This casing, as before stated, extends to the floor line and is there provided with a removable On opposite sides respectively the casing 1 is provided with ways 19 and 20 which extend practically vertically for the major pore tion of its length and, as is indi'cated'at 21' in Fig 1, is inclined toward the outlet conduit 22Wl1lCl1 is threaded in the box 23 provided in the casing. The axis of the conduit 22 is materially below that of the-ferrule 3 V as shown. The valve is open on the inner side engaging the ways being U shaped in form in cross section as will be understood from Fig. 2, and tapering in form as will be understood from Fig. 1. The valve 14 at its upper end is provided with a boss 24 threaded to receive the threaded stem 13 whereby ro tation of the hand wheel 18 causes the stem to revolve and to force the valve to the posi tion shown in Fig; l or to raise it from the said position depending upon the-direction of rotation of the hand Wheel. It will be evi-' dent from the foregoing that by turnnig the Wheel 18 in one direction will force the valve downwardly on the stem and, due to its riding on the inclined portion 21 of thekways, will wedge the same tightly in contact with the inner end of the outlet conduit 22 which extends into the chamber a slight distance as shown and finished to provide a seat for the valve. Preferably adjacent the boss 23on the inner wall of the casing. is provided a protruding portion or lug 25-adapted to cause the surface 26 of the valve to engage thereagainst whenthe valve is moved upwardly to open the conduit 22. This lug does not extend into the chamber to a distance quit-e equal to the extent to which the member 22-extends thereinto but practically to the same extent and the purpose of the lug is to guide the terminal point of the valve in such manner that in closing the valve fromits openposition the end thereof is held from striking the inwardly projecting end of the conduit 22and thus insures the valve passing the end of the conduit to the position shown in Fig. 1.

The operation of the device will be readily understood from the foregoingthat is, the

inlet member?) being provided with the swing valve which tends normally by gravity to assume the closed position and being above the bottom of the chamber formed bythe casing 1' and also above the axis of the ou e conduit. 22, provision is made for any nonliquid material to drop from theinner end of the member 3 to below the swing valv 4 and thus readily P sthrough the normally open outlet. This arrangement alone largely eliminates a source of the trouble in devices of this character but in the event the swing valve is held open by material lying in'the Y outletend of the member3and the swing valve thus held from completely closing under pressure of the back flow, and back a c flow through the member 3 and drain conduit, 6 connected therewith may be prevented by the closing of the valve 14. This valve ismade intapered form'preferably of thin material asindicated in order that it may readily be forced through material that may lie 'in or at the mouth of'the' outlet conduit22 and the, inconvenience that would arise through back flow into the drain connection and thence into a building may positively be eliminated by themanua-lly operable valve.

By arranging this device with a'detachable cover at or slightly above the floorsurface the said cover may be removed from the.

casing after the valve is closed by removing the hand wheel 18 and'the retaining nut '15;

This will permit access to the interior of the chamber for cleaning or repair even though there is a tendency, toback flow inv the outlet line, the chamber-being held ,free from such flow or pressure by-the closedvalve 14'. To

permit a removal of {the hand wheel"18,'=the end of the stem maybe squared as indicated at 31 onwhich the handle fits and on which it may be retainedin placeby the removable nut indicated at 32. e In this manner the cap can be removed while the valve member 14 is still in wedged position'clos'ing the outlet. I I

Having thus fully described my invention, what I claim anddesire to secure by Letters Patent of the United States is'- 1. A fitting for sewage conduits com'p'ris ing a casing,- a hollowmember extending into'the casing at one side'adapted for'connection with a drain andproviding an inlet to the casing, a swing valveion the's'aid memjber within the easing'adapted to normally close the said conduit by pressure within the" casing, an outlet conduit extendin'g into thesaid casing at a pointbelow the inlet member, thefsaid out-letconduit' having a finished I inner end, a valve member within the-casing ,adaptedto be movedto position over the said finished end of the outlet conduit 'or withdrawntherefronn'and an inclined way in the V casing engaged bythe valve in its movement V to closed position providing a' mea-ns for wedgingthe valve against the endof the outletcconduit.

'2. A fitting for sewage conduits located below a floor or streetisurface comprising a c chambered casing, the upper end of which 1 extends to the said surface-,a ferrule inserted. in the casing with an aperture provided therein at a distance from the bottom, a swing v valve on the inner end of the ferrule, the opposite end of the ferrule being adapted for connection with a drainage conduit, the said cas ng havmg an aperture on the opposite slde of the casing,

an outlet conduit therein having a finishing inner end within the easing, a slide valve movable vertically in the casing, a stem therefor projecting through the '10 I per end for operation thereof, the said valve said upper end, a hand wheel on the said uphaving a flat side face to engage the end of the outlet conduit,the opposite side of the i valve being formed at an angle thereto, an

"which the angular face of the valve rides, the

inclined way on each side of the casing on said valve on being moved to closed position being wedged between'the ways and the outlet end of the conduit, the arrangement being such that rotation ofthe hand wheel in one directionraises thevalve from its seat and ini'the opposite direction forces it therei 1 against. r

3. A fittingfor sewage conduits comprising a casing providinga hollow chamber, a scalable cover for the upper end thereof, said chamber having an opening on one side near "thebottom for connection of an inlet con duit, a hollow tubular member mounted in the said opening and extending into the interior of the chamber, a swing valve on the inner end [of the said member adapted to normally close the same by pressure within the chamber, said chamber further having an opening on the side opposite and below the first named opening, an outlet conduit connected ,withthe last named opening and having an end portion extending into the said chamber,

a valvemember in the saidchamber having a stem projectingthrough the said cover,

. means including a hand wheel on the extend ing end of the stem for moving the valve vertically, said chamber'having vertical ways terminating in a portion adjacent the outlet inclined to the vertical on which the valve rides, said valve having portions for engagingthe ways and an opposite portionseating 4:. A fitting for sewage conduits comprising a casing providing a hollow chamber, a

cover for sealing theupper end thereof, said chamber having an'opening on one side for the connection of an inlet conduit and further having an opening on the opposite side and cation.

EDWARD W. N. BOOSEY.

against the inner end of the outlet conduit i under pressure when the valve is moved to ride the inclined portion of the ways.

belowthe first named opening, an outlet con- 7 duit'connected withthe last named opening and having an end portion extending into the chamber, a vertically slidable valve memher in the chamber, the chamber having verticalways including a portion adjacent the I p-Z'outlet inclined to the vertical on which the :valve rides,said valve having opposite and simllarly inclined side portions for engag- I 

